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引用第3楼79092040于2008-07-21 13:46发表的 :, a1 Y, W; k+ R% k; X
IEC60335-1 里有这样一段话:& R" X j: K6 t% V3 N3 |0 \
When the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are/ w* i5 s# y1 G# }& R$ L6 |6 a0 T
– 750 °C, for connections which carry a current exceeding 0,2 A during normal operation;
: [, r. l* N1 L* [" X, j$ j( A' @. c– 650 °C, for other connections.- r' u* a/ |/ b% h) l5 g5 j. h
NOTE 1 Contacts in components such as switch contacts are considered to be connections. l2 y) |- Z8 l+ g9 p
....... 这上面说的是支撑大于0.2A带电部件的零件做750°C,其它的650°C,大于还是小于很好判定。是否支撑带电部件也不难分辨,一般的开关都是要做的。 |
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